Flow-through cell based on an array of gold microelectrodes obtained from modified integrated circuit chips

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorAugelli, M. A.
dc.creatorNascimento, V. B.
dc.creatorPedrotti, J. J.
dc.creatorGutz, IGR
dc.creatorAngnes, L.
dc.date2014-05-20T15:29:33Z
dc.date2016-10-25T18:04:49Z
dc.date2014-05-20T15:29:33Z
dc.date2016-10-25T18:04:49Z
dc.date1997-08-01
dc.date.accessioned2017-04-06T00:12:31Z
dc.date.available2017-04-06T00:12:31Z
dc.identifierAnalyst. Cambridge: Royal Soc Chemistry, v. 122, n. 8, p. 843-847, 1997.
dc.identifier0003-2654
dc.identifierhttp://hdl.handle.net/11449/39118
dc.identifierhttp://acervodigital.unesp.br/handle/11449/39118
dc.identifier10.1039/a701519d
dc.identifierWOS:A1997XQ87300023
dc.identifierhttp://dx.doi.org/10.1039/a701519d
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/882084
dc.descriptionThe construction of a flow-through cell incorporating an array of gold microelectrodes is described and its application to flow injection analysis with amperometric detection is presented, Simple modification of almost any conventional integrated circuit chip, used as an inexpensive source of pre-assembled gold micro-wires, leads to the rapid and successful preparation of arrays of 8-48 elements, the polymeric encapsulation material from the top face of the chip is removed by abrasion until the gold micro-mires (used to interconnect the silicon circuit to the external contact pins of the chip) are disrupted and their transversal (elliptical) sections become exposed. Once polished, the flat and smooth top surface of the gold microelectrode-array chip (MEAC) is provided with a spacer and fitted under pressure against an acrylic block with the reference and auxiliary electrodes, to form the electrochemical (thin-layer) flow cell, while the contact pins are plugged into a standard IC socket, This design ensures autonomous electric contact with each electrode and allows fast dismantling for polishing or substitution, the performance of flow cells with MEACs was investigated utilizing the technique of reverse pulse amperometry without oxygen removal, A method was established for the determination of the copper concentration in sugar cane spirit, regulated by law for beverages, Samples from industrial producers and small-scale (alembic) brewers were compared, With a 24 MEAC, a detection limit of 30 mu g I-l of copper (4.7 x 10(-7) mol l(-1) of Cu-II for 100 mu l injections) was calculated, Routine operation was established at a frequency of 60-90 determinations per hour, Intercomparison with atomic absorption spectrometric determinations resulted in excellent agreement.
dc.languageeng
dc.publisherRoyal Soc Chemistry
dc.relationAnalyst
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectflow-through cell
dc.subjectgold microelectrode array
dc.subjectintegrated circuit chips
dc.subjectreverse pulse amperometry
dc.subjectflow injection analysis
dc.titleFlow-through cell based on an array of gold microelectrodes obtained from modified integrated circuit chips
dc.typeOtro


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